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AMD CS5535 manual Miscellaneous Initializations, Initialize Graphics Subsystem, Monochrome Support

Models: CS5535

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4.5Miscellaneous Initializations

Initialization

32430C

4.5Miscellaneous Initializations

In addition to the previous processor initializations, the graphics card(s) must also be initialized.

4.5.1Initialize Graphics Subsystem

There are two different modes: CRT and TFT. Graphics initialization needs to identify which kind of support is required by reading an MSR in the Video Processor.

Entry Conditions:

4 GB descriptor in FS core register.

GeodeLink descriptors initialized.

VSA initialized.

First MB of DRAM functional.

Interrupts enabled.

DMA initialized.

PCI bus functional.

Procedure:

IF <PCI graphics card exists> THEN

Jump to PCI graphics BIOS for initialization.

ELSEIF <ISA graphics card exists> THEN

Jump to ISA graphics BIOS for initialization.

ELSE <SoftVGA required by setup> THEN

Initialize SoftVGA during VSA initialization

Jump to integrated graphics BIOS for initialization

ENDIF

4.5.1.1Monochrome Support

GeodeROM includes the appropriate INT 10h support for monochrome video adapters.

SoftVG needs an extra hole at B000h-B7FFh when a mono card is present.

4.5.1.2Dual Monitor Support

GeodeROM provides dual monitor support. GeodeROM assumes that the external card is the primary graphics card and that the XpressGRAPHICS™ system is secondary.

AMD Geode™ GX Processor/CS5535 Companion Device GeodeROM Porting Guide

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AMD CS5535 manual Miscellaneous Initializations, Initialize Graphics Subsystem, Monochrome Support, Dual Monitor Support

Contents

AMD Geode GX Processor CS5535 Companion Device GeodeROM Porting Guide Publication ID 32430CApril AMD Geode GX Processor/CS5535 Companion Device GeodeROM Porting GuideTrademarks 2006 Advanced Micro Devices, Inc. All rights reservedAMD Geode GX Processor/CS5535 Companion Device GeodeROM Porting Guide 6.0 Setup Options 7.0 Memory Map Appendix A Support Documentation ContentsList of Figures List of Tables 1.0 Overview 2.0 Model Specific Registers32430C ContentsAMD Geode GX Processor/CS5535 Companion Device GeodeROM Porting Guide List of Figures Figure 7-3. CPU Core Cache Region ConfigurationsFigure 3-1. GeodeLink Architecture Topology Figure 4-1. Clock Control Figure 7-1. GLIU Descriptor MapList of Figures 32430CAMD Geode GX Processor/CS5535 Companion Device GeodeROM Porting Guide List of Tables Table 4-1. Default Region Configuration Properties Bit DescriptionsTable 4-2. Diverse Device I/O Locations List of TablesList of Tables 32430CAMD Geode GX Processor/CS5535 Companion Device GeodeROM Porting Guide 1.1 Introduction Overview11.2 Assumption Assumption 32430CAMD Geode GX Processor/CS5535 Companion Device GeodeROM Porting Guide 2.1 Example MSR Transaction Model Specific Registers2RDMSR WRMSRModel Specific Registers 32430CAMD Geode GX Processor/CS5535 Companion Device GeodeROM Porting Guide AMD Geode GeodeLink Architecture3GX Processor CS55353.2 Descriptors 3.1 GeodeLink MSR Addressing3.1.1 Addressing Example 3.2.1 Memory Descriptor TypesInitialization4 4.1.1 Set Clocks and Reset4.1 Processor Initialization Figure 4-1. Clock Control4.1.3 Memory Controller Initialization 4.1.2 Calculating Processor Speed4.1.2.1 CPU Identification 4.1.5 GeodeLink Modules Initialization 4.1.4 Test Extended DRAM4.1.3.1 Size Memory 4.1.5.3 Cache Setup Table 4-1. Default Region Configuration Properties Bit Descriptions4.1.5.4 Region Configuration 4.1.5.1 GLIU Descriptors InitializationDescriptor Allocation GLPCI RegionsDescriptor MSR Address4.2.1 Chipset ID 4.2 AMD Geode CS5535 Companion Device Initialization4.2.2 Set ID Select IDSEL 4.2.3 GLIU Initialization4.2.4.1 IRQ Mapper 4.2.4.5 Multi Function General Purpose Timers MFGPTs4.2.4.2 Keyboard Emulation Logic KEL 1+ 4.2.4.3 System Management Bus SMBus4.2.4.6 ACPI 4.2.4.7 Power Management Logic4.2.4.8 Flash Interface 4.2.4.9 Other Legacy DD Initialization4.2.5 ATA-5 / Hard Drive Initialization Table 4-2. Diverse Device I/O Locations4.2.6 Universal Serial Bus USB 4.2.7 AC97 Audio Controller Initialization4.4 PCI Bus Initialization 4.3 Virtual System Architecture Initialization4.2.8 GeodeLink Control Processor Initialization 4.3.1 Allocate Processor Frame Buffer and VSA2 Memory4.5.1 Initialize Graphics Subsystem 4.5 Miscellaneous Initializations4.5.1.1 Monochrome Support 4.5.1.2 Dual Monitor SupportInitialization 32430CAMD Geode GX Processor/CS5535 Companion Device GeodeROM Porting Guide 5.1 Implementation Implementation55.1.1 Clocking 5.1.2 Scratchpad InitializationImplementation 32430CAMD Geode GX Processor/CS5535 Companion Device GeodeROM Porting Guide Setup Options6 AMD Geode GX Processor/CS5535 Companion Device GeodeROM Porting Guide 32430CFigure 7-1. GLIU Descriptor Map Memory7MapFigure 7-2. CPU Core Cache Descriptors Figure 7-3. CPU Core Cache Region Configurations Memory Map Figure 7-4. GeodeROM Flow - GX Processor/CS5535 Device32430C AMD Geode GX Processor/CS5535 Companion Device GeodeROM Porting Guide32430C Figure 7-4 GeodeROM Flow - GX Processor/CS5535 Device ContinuedTable A-1. Revision History A.1 Document Revision HistoryRevision # PDF Date